RE Armillaria caligata
Armillaria caligata is really Tricholoma caligatum. It is
mycorrhizal and sometimes is said to be a synonym of the
Japanese Matsutake, a highly prized edible. Presumably
interest stems from that aspect. For those accepting the
synonymy there is Japanese literature on attempts to
cultivate the mycorrhizal fungus (not necessarily the
mushroom fruitbodies). For the true T. caligatum there is
less literature. Just what is that you want to know?